If the carbs are still the same type as my 90 Indy 500 and 79 Kawi Invader, then it sounds to me like your floats are sticking in the float bowls. This will cause the fuel to keep flowing into the carb more than it needs and will cause the excess fuel to flow out the carb'* vent tubes. I had this problem with my Indy one year, I just tapped the side of the carbs with a long 1/2" extension from my socket set and the floats free'd up and all was well. If your jets are gummed up, before you take your carbs apart to clean them, count the number of turns of the screw driver until both the air and fuel adjustment screws are fully seated. Write this down for each screw and eack carb. Then, when you have them back together, you can start by fully seating the screws and then backing them out to the previous setting. Chances are, the original settings are the correct settings unless some-one started playing with them
. Cleaning the carbs is easy to do. Just pick up a service manual first, the exploded views of the carbs are a lot of help. You should take the carb completely apart. Then soak and spray out every passage with carb cleaner. Carbs can gum up in just 1 "off-season" as todays gas will start to break down in 3 months. Next year use Sta-Bil in your last tank full at the end of the season. Glad to hear the Ski-Doo is running well. I like the seating position on them a-lot better than my Indy. Indy'* are for people with shorter legs than mine, the Cats and Doos are actually closer to my Invader as far as comfort and control. I love my Invader!! At 80mph, I feel like I'm about to break the sound barier. On the Indy, 90 feels like I'm just sitting on big Sofa. No Fear, No Fun!